hwmon: (xgene) Migrate to use generic PCC shmem related macros

mainline inclusion
from mainline-v6.7-rc1
commit 2cf39b806be74661cc347e99796c97d9f54b7c42
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I8GQ30
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2cf39b806be74661cc347e99796c97d9f54b7c42



--------------------------------

Use the newly defined common and generic PCC shared memory region
related macros in this driver to replace the locally defined ones.

Cc: Jean Delvare <jdelvare@suse.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20230927-pcc_defines-v2-3-0b8ffeaef2e5@arm.com


Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>